Aerial Photo 1999 Color Infrared 1-meter DOQQ

Abstract

The Aerial Photo 1999 Color Infrared 1-meter DOQQ data represents are traditional film based aerial photos
taken from planes that were scanned and geo-referenced. The geo-referencing process included compensation
for sensor orientation and ground elevation. The resulting images are Digital Orthophoto Quarter Quads (DOQQs).

According the USGS:

Color infrared (CIR), or false color, film is sensitive to green and red in the visible portion of spectrum of light
and extends into the near-infrared region of the spectrum. Vegetation is distinctly red to magenta in CIR images
because vegetation is highly reflective in the near-infrared portion of the spectrum.

Purpose

The color-infrared DOQs were produced to create spatially accurate aerial photo images that could be used for mapping a variety of
features such as land cover, hydrography, agricultural features and urban features.